The purpose of this contract is to evaluate technical information contained within Dawn Mining Company’s (DMC’s) Alternate Concentration Limit (ACL) application, and to independently verify that the proposed ACLs, in accordance with WAC 246-252-030 (5) (j) and (k), will not pose a substantial present or potential (including future) hazard to human health or the environment, and that the limits are as low as reasonably achievable, considering practicable corrective actions. The technical information will include (but is not limited to): the factors identified in WAC 246-252-030 (5)(k)(i) and (ii); facility description, operational history and decommissioning history; groundwater flow and transport modeling; human health and environmental health risk and dose assessment (incorporating hazard, exposure and toxicity assessments and risk / dose characterization); and, corrective action assessment.